Separable fastener



F. s. CARR SEPARABLE FASTENER Dec. 4, 1923.

Filed March 8, 1921 Patented er. 4, i923.

` star nnen s. Genn, or NEWTON, MASSACHUSETTS, assitance To cnnarasfrnnna'coar- PANY, or CAMBRIDGE, MASSACHUSETTS, A eonronarreN or MAINE? seran-ABLE rfis'rnnnn.

Appiicaeionined irai-ch s, i921, serial No. esogree.

To al?, whom/.it mag/concern.' Be it known that I, FRED S. GARR, a citizen of the United States, and a resident ef Newton, in the county of Middlesex, yCommonwealth of Massachusetts, have invented an Improvement'in vieparable Fasteners, 0f which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.-

This invention pertains to improvements in separable fasteners. It 'is' among the objects of the invention to provide a superior fastener of inexpensive construction. i

Referring to the drawings, which show a preferred form of one embodiment of my invention Figure 1 is a front elevation of a fastener secured to its carrying fabric, the latter being broken away;

Fig. 2 is a section on the line 2 2 of Fig. l; f

Fig. 3 isa section on the line 3-3 of Fig. 2; and

Fig. 4 is a diagrammatic view illustrating the attachment of a stud to its carrying fab-ric. Y

Referring to the drawings and to the preferred 'form of my invention selected for illustrative purposes, I have shown a stud having a head 5, a neck 6 and a base fia-nge 7, which is preferably secured to the stud-carrying fabric 8 by prongs 9 penetrating the fabric and ianged over within a1 stud-securing ring 10 providing interiorly an anvil or prong-turning surface 11. Where the preferred form of stud-securing means illustrated is used, the securing operation may be eiected, as best shown in Fig. t, by a die 12 pressing against the base of the stud and a die 13 back-supporting the studsecuring ring 10, the prongs 9 being bent inwardly by the anvil portion 11 as the dies are pressed towards one another.

The preferred' form of socket illustrated includes a casing 20 containing a spring 21, best shown in Fig. 3. This spring 21 may be flat and formed of any suitable spring metal, such as brass, formed to provide a stud-receiving aperture 22v and split to provide resiliency. The preferred form of spring illustrated is split at 23 from they stud-receiving aperture 22 to the periphery of the spring and is provided at 24 with preferably arcuate cut-away portion into and may be regarded as` afcontinuation of the same. The stud-receiving aperture l22 may have lateral notches oppositely disposed 26 and 27, into which .the neck ofthe stud ymay enter ysomewhat but not sufficiently te become locked therein against desired sep-VY aration by relative tipping of stud and socket. The spring 21 may be notched peripherally at 28 and 29 and the casing 20' may be provided with abutments or projections30 and 31 entering these notches, but providing sufficient clearance to permit opening of the spring t0 receive the headof the stud. The notches 28, 29 and projections 30, 31 are for the purpose of preventing axial turning of spring 21 within its casing. lt will be observed that in the preferred form of the invention the lineof'slits 23 and 25 is substantially at right angles to the line joining notches 29 and 30.

The preferred form of spring and casing heretofore described is peculiarly well adapted to resist undesired separation 'when under lateral strain. When lateral strain is l exerted toward, either of the notches 26, 27 the neck of the studpartially enters therein, so that separation will not be readily effected by the resolutionof forces tending to produce relative tipping 'between stud and socket. socket may be separated by va tipping strain at a somewhat greater angle than that produced by the resolution of forces arising from which the slit. 25 extends.'l Slit 25 is pref? erably in alinement with slit 23,:asshown,

On the other hand, the stud and j lateral strain. Under strain in the direcy i tions heretofore mentioned in which the Vneck of the stud tends to enter lone or the the casing, this engagement tending to press Y the opposite sides of the spring together and thereby to oppose stud-releasing opening thereo While the socket containing the spring may be varied for different purposes, I'may conveniently secure it to the socket-carrying fabric /iOVby metallic securing means, and" Where this is the .case the spring may-be held.` in the casing by a spring-retaining plate il through which prongs i2 project,

socket casing. The attachment ofthe socket to theY fabric may be generally similar to the Vattachment of the stud to its carrying fabric hereinbefore described;

While I have shown and described a pieV ferred form of one embodiment of my inventionfit will be understood that major changes 'involving omission, substitution,

alteration and 'reversal of parts, and even ychanges inthe mode ofy operation, maybe made Without departing from the scope of my invention, Which is best defined in the following claims.

Claims:

l. A separable fastener comprising, in combination, a4 stud having a head and a neck, and arsocket including acasing and a flat sheet metal spring in the casing, said spring having a stud-receiving aperture and lateral peripheral notches and projections from the casing entering said notches.

2. VA separable fastener comprising, in combination, a stud having ahead and neck, and a socketincluding a casing and a spring in the casing, said spring having a stud-receiving aperture and lateralY peripheral notches and projections from the casing entering said notches, said spring having a slit extending generally in direction transverse to a line between said notches.

3. A separable fastener comprising, combination, a stud having a head and a neck, and a socket including a casing and a spring in the casing, said spring having a stud-receiving aperture and lateral periph-k eral notches and projections from the casing entering said notches, said spring having la slit extending generally in a direction transverse to a line between saidnotches,l

said slit extending on opposite sides of the stud-receiving aperture in said spring.

e. A separable fastener comprising, inr

combination, a studV having a head and at one side of said aperture and a slit 'connecting said aperture with said Vcut-away portion. 5. A combination, a stud having a head and a neck, and a socket including a casing and a spring in the casing, said spring having a stud-receiving aperture, ,a .cut-away portion separable fastener comprising, in,V

at one side of saidaperture and a slit coin Y necting said aperture with said cut-away portion, and aj second slit between said studi` receiving aperture and the spring. Y

separable Vfastener comprising, in combination, a stud having a head and la neck, andv socket including a casing anda spring in thercasing said spring havinga stud-receiving aperture, a cut-away portion periphery'ofy the at one side ofsaid aperture and a slit .con-YV necting said aperture with said cut-away portion, said cut-away portion arcuate in form. Y

7. rEhe combination of a separable fastenervineinber havin@ prongs'projecting therefrom and a ringlikesecuring part for application to the opposite side ofthe fabric from said member and. providing an anvil surface inclined to bend said prongs inwardly and a.

cleiiching surface adjacent saidV fabric against `which said prongs bear. When clenched.

Ysaid prongs.

` In testimony whereof, l have signed my name to Vthis specification.

rnjnn s. cana.V

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